linux-kernel - Re: [patch 1/3] x86/fpu/xsave: Support XSAVEC in the kernel

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Message-ID: <05d59fea-f6f6-6d1a-cc0e-c032202ecc18@intel.com>
Date:   Thu, 14 Apr 2022 07:43:51 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, Andrew Cooper <andrew.cooper3@...rix.com>,
        "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
Subject: Re: [patch 1/3] x86/fpu/xsave: Support XSAVEC in the kernel

On 4/4/22 05:11, Thomas Gleixner wrote:
>  - Create a software defined X86_FEATURE_XCOMPACTED to select the compacted
>    XSTATE buffer format for both XSAVEC and XSAVES.

We probably should have logically separated the compacted format bits
from the supervisor bits long ago.  I'm glad this is doing it now.